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soxofaan/zequals.py

Last active November 28, 2017 08:52
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"Zequals" ruthless rounding: just keep one leading digit.
Raw
zequals.py
import math
def zequals(x):
"""
"Zequals" ruthless rounding: just keep one leading digit.
examples:
123 -> 100
4567 -> 5000
-0.0345 -> -0.03
also see https://www.youtube.com/watch?v=aOJOfh2_4PE
@param x: int or float
@return: "zequalled" value
"""
if x == 0:
return 0
else:
b = math.pow(10, math.floor(math.log10(abs(x))))
return b * round(x / b)
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